California Nebula, Exmoor 2018

NGC 1499

The California nebula, also known as NGC 1499, an emission nebula around 100 light-years long. Hydrogen atoms, electrons and energetic starlight as photographed under the pristine dark skies of Exmoor.

Tech Card

Date / Location

10th November 2018, Exmoor, GMT+0, United Kingdom, TEMP: 8C, HUM: 96%, Bortle Class 3 ~SGM: 21.75 mag./arc sec2

Equipment

Camera: Nikon D810A

Imaging Telescope: Takahashi FS-60CB

Correcting Lens: Takahashi Reducer 0.72x (composite focal length at 264mm and focal ratio at f/4.9)

Mount: iOptron CEM25EC

Image Quality

14 bit RAW (NEF)

Exposure time per image / number of composities and sensitivity

ISO 3200, 6 x 180" subs

Total Integration Time

18mins

Calibration Frames

23 Darks, 23 Bias, 25 Flats

Software

PixInsight 1.8 Core

Photoshop